A Home Energy Minute on Energy Savings with Air Conditioning - You can reduce your energy bills by upgrading your air conditioner to a 13 SEER system. This high efficiency ac system will reduce your energy usage by as much as 28% over a 10 SEER system. If you aren't ready to upgrade you're a/c unit, be sure to maintain your central a/c by having a licensed HVAC professional perform a maintenance check to help it cool your home efficiently.